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Mozilla Foundation Security Advisory 2014-44

Use-after-free in imgLoader while resizing images

Announced
April 29, 2014
Reporter
Nils
Impact
Critical
Products
Firefox, Firefox ESR, SeaMonkey, Thunderbird
Fixed in
  • Firefox 29
  • Firefox ESR 24.5
  • SeaMonkey 2.26
  • Thunderbird 24.5

Description

Security researcher Nils discovered a use-after-free error in which the imgLoader object is freed while an image is being resized. This results in a potentially exploitable crash.

In general this flaw cannot be exploited through email in the Thunderbird and Seamonkey products because scripting is disabled, but is potentially a risk in browser or browser-like contexts.

References